1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/**
* Copyright 2023 ByteDance Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package loader
import (
"sync/atomic"
"unsafe"
_ `unsafe`
)
//go:linkname lastmoduledatap runtime.lastmoduledatap
//goland:noinspection GoUnusedGlobalVariable
var lastmoduledatap *moduledata
func registerModule(mod *moduledata) {
registerModuleLockFree(&lastmoduledatap, mod)
}
//go:linkname moduledataverify1 runtime.moduledataverify1
func moduledataverify1(_ *moduledata)
func registerModuleLockFree(tail **moduledata, mod *moduledata) {
for {
oldTail := loadModule(tail)
if casModule(tail, oldTail, mod) {
storeModule(&oldTail.next, mod)
break
}
}
}
func loadModule(p **moduledata) *moduledata {
return (*moduledata)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(p))))
}
func storeModule(p **moduledata, value *moduledata) {
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(p)), unsafe.Pointer(value))
}
func casModule(p **moduledata, oldValue *moduledata, newValue *moduledata) bool {
return atomic.CompareAndSwapPointer(
(*unsafe.Pointer)(unsafe.Pointer(p)),
unsafe.Pointer(oldValue),
unsafe.Pointer(newValue),
)
}
|
